Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014
FES
Net exposure to loss based upon the casualty value provisions
Maximum Exposure	$ 1,293
Discounted Lease Payments, net	1,081	[1]
Net Exposure	212
Other FE subsidiaries
Net exposure to loss based upon the casualty value provisions
Maximum Exposure	716
Discounted Lease Payments, net	495	[1]
Net Exposure	$ 221

[1] The net present value of FirstEnergy’s consolidated sale and leaseback operating lease commitments is $1.1 billion.